Maximum record length added

The plotter now discards the oldest data sets over a settable limit
(currently 100k). Also, increase the re-plotting interval.
Merge pull request #3 from akcramer/master

Modified printing in SAS_TM_Parser. Labels now match SAS GSE
Developing multiple plot windows

Progress made on developing a version that can split the data into
multiple plots.
Merge remote-tracking branch 'upstream/master'